Si元素的添加对Ni_(43)Mn_(46)Sn_(11)合金磁热效应的影响  

Magnetocaloric Effect of Ni_(43)Mn_(46)Sn_(11) Alloy with Si-Doping

作　　者：胡翼[1] 李山东[1,2] 吴建鹏[1] 蔡信乐[1] 裘洁[1] 林剑花[1] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福建福州350007 [2]青岛大学物理科学学院,山东青岛266071

出　　处：《稀有金属》2012年第5期727-731,共5页Chinese Journal of Rare Metals

基　　金：山东省科技厅重点项目(ZR2012F2006);教育部新世纪优秀人才支持计划项目(NCET-08-0631);国家自然科学基金(11074040);福建省杰出青年基金(2010J06001);福建省科技厅科技计划重点项目(2009H0019)

摘　　要：通过对合金Ni43Mn46Sn11Six(x=0.0,0.1,0.2,0.3)磁热效应的研究,发现随着Si含量增加,合金的转变温度(TM)从187 K降到160K,合金的磁熵变也略微减小。在外场变化为3 T时,随着x的增加,合金的磁熵变分别为28.7,24.7,26.1和23.3 J.kg-·1K-1。此外,还利用连续和不连续降温两种方法对Ni43Mn46Sn11Six合金的等温磁化曲线进行了测量。发现两种测量方法测量的磁熵变值存在较大的差异,例如,对x=0的样品,在外场变化为3 T时,连续和不连续降温测量方法算得的磁熵变分别为28.74和38.56 J·kg-·1K-1。The magnetocaloric effect of Ni43Mn46Sn11Six（x=0.0,0.1,0.2,0.3） alloys was investigated.It was revealed that the transition temperature of the Ni43Mn46Sn11Six alloys decreased from 187 to 160 K with the increase of Si content.On the other hand,the magnetic entropy under an applied field of 3 T of Si-doped alloys was also reduced,i.e.28.7,24.7,26.1 and 23.3 J · kg-1 · K-1 for x=0.0,0.1,0.2 and 0.3,respectively.The isothermal magnetization curves were measured by continuous and non-continuous cooling methods,respectively.Two methods gave rise to a relatively large difference in magnetic entropy change ΔSM.For example,the maximum values of ΔSM for sample x=0.0 at 3 T were 28.74 and 38.56 J · kg-1 · K-1 for the continuous and non-continuous cooling methods,respectively.

关 键 词：磁热效应 磁熵变 连续降温方法 不连续降温方法 

分 类 号：TG132.27[一般工业技术—材料科学与工程]